/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

* 

* Description:

*

*/

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

namespace SymbianUtils.FileSystem

{

    public class FSExtensionDescriptor

    {

        #region Constructors

        public FSExtensionDescriptor( string aDescription )

            : this( aDescription, string.Empty )

        {

        }

        public FSExtensionDescriptor( string aDescription, string aExtension )

        {

            iDescription = aDescription.Trim();

            Add( aExtension );

        }

        public FSExtensionDescriptor( string aDescription, IEnumerable<string> aExtensions )

        {

            iDescription = aDescription.Trim();

            AddRange( aExtensions );

        }

        public FSExtensionDescriptor( string aDescription, params string[] aExtensions )

        {

            iDescription = aDescription.Trim();

            AddRange( aExtensions );

        }

        #endregion

        #region API

        public void Add( string aExtension )

        {

            if ( !string.IsNullOrEmpty( aExtension ) )

            {

                string ext = aExtension.Trim();

                if ( !string.IsNullOrEmpty( ext ) )

                {

                    iExtensions.Add( ext );

                }

            }

        }

        public void AddRange( IEnumerable<string> aExtensions )

        {

            foreach ( string e in aExtensions )

            {

                Add( e );

            }

        }

        public bool ContainsExtension( string aExtension )

        {

            string searchFor = aExtension.ToUpper();

            Predicate<string> searcher = delegate( string aEntry )

            {

                return ( aEntry.ToUpper() == searchFor );

            };

            //

            string ret = iExtensions.Find( searcher );

            bool found = !string.IsNullOrEmpty( ret );

            return found;

        }

        #endregion

        #region Properties

        public int Count

        {

            get { return iExtensions.Count; }

        }

        public string FirstExtension

        {

            get

            {

                string ret = string.Empty;

                //

                if ( Count > 0 )

                {

                    ret = this[ 0 ];

                }

                //

                return ret;

            }

        }

        public string[] Extensions

        {

            get { return iExtensions.ToArray(); }

        }

        public string Description

        {

            get { return iDescription; }

        }

        public string this[ int aIndex ]

        {

            get { return iExtensions[ aIndex ]; }

        }

        #endregion

        #region Internal methods

        #endregion

        #region From System.Object

        public override int GetHashCode()

        {

            return iDescription.GetHashCode();

        }

        public override string ToString()

        {

            // Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*

            StringBuilder ret = new StringBuilder( Description );

            //

            if ( ret.Length > 0 && iExtensions.Count > 0 )

            {

                StringBuilder extList = new StringBuilder();

                foreach ( string ext in iExtensions )

                {

                    extList.Append( ext );

                    extList.Append( ";" );

                }

                // Strip final ";".

                extList.Length = extList.Length - 1;

                // Save as formatted extension

                string list = extList.ToString();

                ret.AppendFormat( " ({0})|{1}", list, list );

            }

            //

            return ret.ToString();

        }

        #endregion

        #region Data members

        private readonly string iDescription;

        private List<string> iExtensions = new List<string>();

        #endregion

    }

}